You need to cost out the various options too.
Years ago I discovered that, I could buy a pre-built wheel set from various internet suppliers for about the same price as buying the component parts, even at wholesale prices, and building the wheels myself. I'm thinking that, unless you have some special situation, paying somebody else to lace up new rims isn't going to cost out very well.
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My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.